power conditioners for digital

Lokie, the separation of outlets ("ex. 2 outlets for digital and 4 for analogue") has nothing to do with digital or analogue per se. It's just separating the ground scheme between the sets of outlets, and perhaps adding some filters bewteen the two, to reduce interaction of digital with analogue, and perhaps not doing much of that. Buy any of them you think will be effective and use all the outlets for digital.

If you can install dedicated AC lines from the breaker box to your system, doing that first will give you greater benefit than installing a power conditioner. Dedicated electrical circuits are foundational for good audio and good video, and should be installed first in any system.
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If you have only one dedicated line, a still good alternative to the power conditioner is to add a second dedicated line and move the av computer to that line to get it further isolated from the signal processing gear.